Home / 1,214.24-1,821.64-348.54

Finding the Fourth Proportional to 1,214.24, 1,821.64 and 348.54

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Solution

The fourth proportional to 1,214.24, 1,821.64 and 348.54 is: 522.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,214.24 : 1,821.64 = 348.54 : x
  2. Step 2: Convert to fraction form
    1,214.24/1,821.64 = 348.54/x
  3. Step 3: Cross multiply
    1,214.24x = 1,821.64 × 348.54
  4. Step 4: Simplify right side
    1,214.24x = 634,914.41
  5. Step 5: Solve for x
    x = 634,914.41/1,214.24
  6. Step 6: Final answer
    x = 522.89

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.